/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2002,2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * WARNING: because java doesn't support multi-inheritance some code is
 * duplicated. If you're changing this file you probably want to change
 * DeferredAttrImpl.java at the same time.
 */


package com.sun.org.apache.xerces.internal.dom;

/**
 * DeferredAttrNSImpl is to AttrNSImpl, what DeferredAttrImpl is to
 * AttrImpl.
 *
 * @author Andy Clark, IBM
 * @author Arnaud  Le Hors, IBM
 * @xerces.internal
 * @see DeferredAttrImpl
 */
public final class DeferredAttrNSImpl
    extends AttrNSImpl
    implements DeferredNode {

  //
  // Constants
  //

  /**
   * Serialization version.
   */
  static final long serialVersionUID = 6074924934945957154L;

  //
  // Data
  //

  /**
   * Node index.
   */
  protected transient int fNodeIndex;

  //
  // Constructors
  //

  /**
   * This is the deferred constructor. Only the fNodeIndex is given here.
   * All other data, can be requested from the ownerDocument via the index.
   */
  DeferredAttrNSImpl(DeferredDocumentImpl ownerDocument, int nodeIndex) {
    super(ownerDocument, null);

    fNodeIndex = nodeIndex;
    needsSyncData(true);
    needsSyncChildren(true);

  } // <init>(DeferredDocumentImpl,int)

  //
  // DeferredNode methods
  //

  /**
   * Returns the node index.
   */
  public int getNodeIndex() {
    return fNodeIndex;
  }

  //
  // Protected methods
  //

  /**
   * Synchronizes the data (name and value) for fast nodes.
   */
  protected void synchronizeData() {

    // no need to sync in the future
    needsSyncData(false);

    // fluff data
    DeferredDocumentImpl ownerDocument =
        (DeferredDocumentImpl) ownerDocument();
    name = ownerDocument.getNodeName(fNodeIndex);

    // extract prefix and local part from QName
    int index = name.indexOf(':');
    if (index < 0) {
      localName = name;
    } else {
      localName = name.substring(index + 1);
    }

    int extra = ownerDocument.getNodeExtra(fNodeIndex);
    isSpecified((extra & SPECIFIED) != 0);
    isIdAttribute((extra & ID) != 0);

    namespaceURI = ownerDocument.getNodeURI(fNodeIndex);

    int extraNode = ownerDocument.getLastChild(fNodeIndex);
    type = ownerDocument.getTypeInfo(extraNode);
  } // synchronizeData()

  /**
   * Synchronizes the node's children with the internal structure.
   * Fluffing the children at once solves a lot of work to keep
   * the two structures in sync. The problem gets worse when
   * editing the tree -- this makes it a lot easier.
   */
  protected void synchronizeChildren() {
    DeferredDocumentImpl ownerDocument =
        (DeferredDocumentImpl) ownerDocument();
    ownerDocument.synchronizeChildren(this, fNodeIndex);
  } // synchronizeChildren()

} // class DeferredAttrImpl
